21 May
2012
21 May
'12
5:18 a.m.
I was doing a trawl of related Unix source trees, and found that some early
C code from around 2nd Edition Unix is still in OpenSolaris today:
http://minnie.tuhs.org/cgi-bin/utree.pl?file=V2/cmd/if.c
Choose: Compare this file to OpenSolaris_b135/cmd/fmli/sys/test.c
and then click on the Side Scroll or the Printable button.
There's about 15 lines of code in common between the 2 files.
Cheers,
Warren
21 May
21 May
3 p.m.
On Mon, 21 May 2012, Warren Toomey wrote:
I was doing a trawl of related Unix source trees, and
found that some early
C code from around 2nd Edition Unix is still in OpenSolaris today:
http://minnie.tuhs.org/cgi-bin/utree.pl?file=V2/cmd/if.c
Choose: Compare this file to OpenSolaris_b135/cmd/fmli/sys/test.c
and then click on the Side Scroll or the Printable button.
There's about 15 lines of code in common between the 2 files.
Cool. I recently did the same thing for BSD.
http://www.bsdnewsletter.com/2012/05/Features181.html
Some examples of code that is mostly the same since the first Berkeley
distribution are: colcrt, expand, mkstr, and soelim. But a few others
still have some of the original ~1976-1977 code.
3:43 p.m.
I would have suspected the oldest source code still existing in systems would be along the
lines
/*
* you are not expected to understand this.
*/
:)
aps
Sent from my iPad
On May 21, 2012, at 11:00 AM, "Jeremy C. Reed" <reed(a)reedmedia.net>
wrote:
On Mon, 21 May 2012, Warren Toomey wrote:
I was doing a trawl of related Unix source trees,
and found that some early
C code from around 2nd Edition Unix is still in OpenSolaris today:
http://minnie.tuhs.org/cgi-bin/utree.pl?file=V2/cmd/if.c
Choose: Compare this file to OpenSolaris_b135/cmd/fmli/sys/test.c
and then click on the Side Scroll or the Printable button.
There's about 15 lines of code in common between the 2 files.
Cool. I recently did the same thing for BSD.
http://www.bsdnewsletter.com/2012/05/Features181.html
Some examples of code that is mostly the same since the first Berkeley
distribution are: colcrt, expand, mkstr, and soelim. But a few others
still have some of the original ~1976-1977 code.
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4:15 p.m.
--- On Mon, 5/21/12, Armando Stettner <aps(a)ieee.org> wrote:
I would have suspected the oldest source code still existing in systems would be along the
lines
/*
* you are not expected to understand this.
*/
That would certainly still be appropriate for the Linux context switch code which,
last time I looked, was a horrible mess of gcc "asm" constructs glued together
with C preprocessor macros.
The comment that I miss most, however, is:
/*
* printf should not be used for chit chat
*/
md
22 May
22 May
7:35 a.m.
On Mon, 21 May 2012, Michael Davidson wrote:
/*
* you are not expected to understand this.
*/
Line 2238, of course :-) For any youngsters here, that code is *subtle*.
Vale, both DMR and Dr John Lions (my lecturer at UNSW).
That would certainly still be appropriate for the
Linux context switch
code which, last time I looked, was a horrible mess of gcc "asm"
constructs glued together with C preprocessor macros.
Typical Penguin/OS. I am in stitches.
The comment that I miss most, however, is:
/*
* printf should not be used for chit chat
*/
My favourite too :-) We ended up implementing the call via the TTY
interface, so that our 11/40 would not be brought to her knees.
-- Dave
4357
days inactive
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4 comments
5 participants
participants (5)
-
Armando Stettner -
Dave Horsfall -
Jeremy C. Reed -
Michael Davidson -
Warren Toomey